[JENKINS-57974] If you do need to escape '$', use '$'.

1. install the Jenkins Parameterized Trigger plugin (2.35.2)


2. create a freestyle job


3. click Add build step


4. click Trigger/call builds on [sic] other projects


5. click Add Parameters


6. click Restrict matrix execution to a subset


7. click


8. read the bottom of the help:

However, Jenkins variable expansion leaves undefined variables as-is, so most of the time your Groovy string line expression syntax will survive the expansion, get passed to Groovy as-is, and work as expected. If you do need to escape '$', use '$'.

Expected results: the two things should presumably be different.

The relevant code is:

https://github.com/jenkinsci/parameterized-trigger-plugin/blob/55f8d5b10f00164a090972f8af89794acddf870b/src/main/resources/hudson/plugins/parameterizedtrigger/matrix/MatrixSubsetBuildParameters/help-filter.html#L20

If you do need to escape '$', use '$$'. 

I'm not going to fix this right away. Filing it because I found it while reading the help for everything and I'm punting as I'm not quite sure about the fix.

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Originally reported by jsoref, imported from: If you do need to escape '$', use '$'.

• status: Open
  
• priority: Minor
  
• component(s): parameterized-trigger-plugin
  
• resolution: Unresolved
  
• votes: 0
  
• watchers: 1
  
• imported: 2025-12-07
  

Raw content of original issue

	
install the Jenkins Parameterized Trigger plugin (2.35.2)

	
create a freestyle job

	
click Add build step

	
click Trigger/call builds on [sic] other projects

	
click Add Parameters

	
click Restrict matrix execution to a subset

	
click 

	
read the bottom of the help:



However, Jenkins variable expansion leaves undefined variables as-is, so most of the time your Groovy string line expression syntax will survive the expansion, get passed to Groovy as-is, and work as expected. If you do need to escape '$', use '$'.

Expected results: the two things should presumably be different.


The relevant code is:


https://github.com/jenkinsci/parameterized-trigger-plugin/blob/55f8d5b10f00164a090972f8af89794acddf870b/src/main/resources/hudson/plugins/parameterizedtrigger/matrix/MatrixSubsetBuildParameters/help-filter.html#L20



If you do need to escape '$', use '$$'. 



I'm not going to fix this right away. Filing it because I found it while reading the help for everything and I'm punting as I'm not quite sure about the fix.